While any particular move could be a boneheaded one which could set us on the path to Armageddon, I actually think the general concept of Trump blowing up our diplomatic protocols is fine. No I am not here to praise Trump. Likely he will set us on the path to Armageddon. Still I've long seen the way various long-established "rules" of doing thing seem to serve little purpose other than to make sure that the deep state maintains its control of the executive.
Some of our diplomatic niceties are stupid, though I do understand they exist for good reasons, even if they exist for bad ones, as I suspect, also, too.
